Ball and Roller Bearings - Ntn-snr.com
Ball and Roller Bearings - Ntn-snr.com
Ball and Roller Bearings - Ntn-snr.com
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Bearing Tolerances<br />
Table 6.5 Tolerance for tapered roller bearings of inch system<br />
Table 6.5 (1) Inner rings<br />
Unitm<br />
Nominal bore diameter <br />
Single bore diameter deviation <br />
d<br />
∆ds <br />
<br />
mm<br />
<br />
Class 4<br />
Class 2<br />
Class 3 Class 0 Class 00 <br />
over incl. high low high low high low high low high low<br />
<br />
76.2<br />
266.7<br />
304.8<br />
609.6<br />
914.4<br />
1,219.2<br />
76.2<br />
266.7<br />
304.8<br />
609.6<br />
914.4<br />
1,219.2<br />
<br />
+13<br />
+25<br />
+25<br />
+51<br />
+76<br />
+102<br />
+127<br />
0<br />
0<br />
0<br />
0<br />
0<br />
0<br />
0<br />
+13<br />
+25<br />
+25<br />
+51<br />
<br />
<br />
<br />
0<br />
0<br />
0<br />
0<br />
<br />
<br />
<br />
+13<br />
+13<br />
+13<br />
+25<br />
+38<br />
+51<br />
+76<br />
0<br />
0<br />
0<br />
0<br />
0<br />
0<br />
0<br />
+13<br />
+13<br />
+13<br />
<br />
<br />
<br />
<br />
0<br />
0<br />
0<br />
<br />
<br />
<br />
<br />
+8<br />
+8<br />
<br />
<br />
<br />
<br />
<br />
0<br />
0<br />
<br />
<br />
<br />
<br />
<br />
Table 6.5 (2) Outer rings<br />
Nominal outside diameter<br />
d<br />
<br />
266.7<br />
304.8<br />
609.6<br />
914.4<br />
1,219.2<br />
mm<br />
over incl.<br />
266.7<br />
304.8<br />
609.6<br />
914.4<br />
1,219.2<br />
<br />
<br />
<br />
<br />
<br />
Single outside diameter deviation<br />
∆D <br />
<br />
<br />
<br />
<br />
<br />
<br />
<br />
<br />
<br />
<br />
<br />
<br />
<br />
<br />
Class 4 Class 2 Class 3<br />
Class 0 Class 00<br />
over incl over incl over incl over incl over incl<br />
+25<br />
+25<br />
+51<br />
+76<br />
+102<br />
+127<br />
0<br />
0<br />
0<br />
0<br />
0<br />
0<br />
+25<br />
+25<br />
+51<br />
+76<br />
<br />
<br />
0<br />
0<br />
0<br />
0<br />
<br />
<br />
+13<br />
+13<br />
+25<br />
+38<br />
+51<br />
+76<br />
0<br />
0<br />
0<br />
0<br />
0<br />
0<br />
+13<br />
+13<br />
<br />
<br />
<br />
<br />
0<br />
0<br />
<br />
<br />
<br />
<br />
+8<br />
<br />
<br />
<br />
<br />
<br />
Unitm<br />
0<br />
<br />
<br />
<br />
<br />
<br />
Table 6.5 (3) Effective width of inner rings with roller <strong>and</strong> outer rings<br />
Nominal Nominal<br />
Overall width deviation of assembled single row tapered roller bearing Overall width deviation<br />
bore<br />
outside<br />
of assembled<br />
∆Ts<br />
diameter<br />
<br />
4-row<br />
diameter<br />
tapered roller bearings<br />
d<br />
d<br />
<br />
∆B2s, ∆C2s<br />
mm<br />
mm<br />
<br />
Class 4<br />
Class 2<br />
Class 3<br />
Class 0,00 Class 4,2,3,0<br />
over incl. over incl. high low high low high low high low high low<br />
101.6<br />
101.6<br />
304.8<br />
304.8<br />
304.8<br />
609.6<br />
609.6<br />
508.0<br />
508.0<br />
609.6 <br />
<br />
+203<br />
+356<br />
+381<br />
+381<br />
+381<br />
0<br />
-254<br />
-381<br />
-381<br />
-381<br />
+203<br />
+203<br />
+381<br />
+381<br />
<br />
0<br />
0<br />
-381<br />
-381<br />
<br />
+203<br />
+203<br />
+203<br />
+381<br />
+381<br />
-203<br />
-203<br />
-203<br />
-381<br />
-381<br />
+203<br />
+203<br />
<br />
<br />
<br />
-203<br />
-203<br />
<br />
<br />
<br />
+1,520<br />
+1,520<br />
+1,520<br />
+1,520<br />
+1,520<br />
-1,520<br />
-1,520<br />
-1,520<br />
-1,520<br />
-1,520<br />
Table 6.5 (4) Radial deflection of inner <strong>and</strong> outer rings<br />
Nominal outside diameter <br />
Inner ring radial runout Kia <br />
d<br />
<br />
Outer ring radial runout Kea <br />
<br />
<br />
<br />
<br />
mm<br />
<br />
<br />
<br />
Class 4 Class 2 Class 3 Class 0<br />
over<br />
incl.<br />
max<br />
<br />
304.8<br />
609.6<br />
914.4<br />
304.8<br />
609.6<br />
914.4<br />
<br />
51<br />
51<br />
76<br />
76<br />
38<br />
38<br />
51<br />
<br />
8<br />
18<br />
51<br />
76<br />
4<br />
<br />
<br />
<br />
Unitm<br />
<br />
<br />
<br />
<br />
Class 00<br />
2<br />
<br />
<br />
<br />
A-38
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